What does the STDX sizing mean for these bearings?

The STDX sizing indicates that these bearings are 0.001 inch undersize on both the main and rod diameters compared to a standard size bearing. This is commonly used when a crankshaft has been machined undersize during a rebuild to achieve the correct oil clearance.

Are these bearings suitable for a brand new, unmachined crankshaft?

Typically, STDX undersize bearings are intended for use with crankshafts that have been machined undersize. For a brand new, standard-sized crankshaft, you would generally look for standard size bearings unless your engine build specifications require otherwise.

What is the typical construction of King Engine Bearings?

King Engine Bearings are generally constructed with a multi-layer design. This usually includes a steel backing for structural integrity and a babbit overlay that provides a smooth bearing surface for the crankshaft to rotate against.

Specifications

Brand: King Engine Bearings
Part #: CR4695XPCSTDX
UPC: 611500624735

King Engine Bearings Ford Ecoboost 2.0L/2.3L (Size STDX) Connecting Rod Bearing Set

Name: King Engine Bearings Ford Ecoboost 2.0L/2.3L (Size STDX) Connecting Rod Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-ecoboost-2-0l-2-3l-size-stdx-conn-t14-769935
Price: 173.82 USD
Availability: BackOrder

$173.82

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King Engine Bearings CR4695XPCSTDX Connecting Rod Bearing Set for Ford Ecoboost 2.0L/2.3L engines. STDX size.

Key Features

Fits Ford Ecoboost 2.0L and 2.3L engines.
Connecting rod bearing set.
STDX size, which is 0.001 inch undersize on the main and rod diameters.
Well-built construction for reliable performance.
Designed to help achieve proper oil clearance on machined crankshafts.

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About this part

Product Details

This set includes King Engine Bearings connecting rod bearings for Ford Ecoboost 2.0L and 2.3L engines. These bearings are specifically sized STDX, which means they are 0.001 inch undersize on the main diameter and 0.001 inch undersize on the rod diameter compared to standard size. This undersize is often used to achieve proper oil clearance when crankshaft journals have been machined undersize during a rebuild.

King Engine Bearings are known for their well-built construction, often featuring a multi-layer design with a steel backing for strength and a babbit overlay for smooth operation against the crankshaft. The STDX sizing is a critical detail for engine builders who need precise control over oil clearances, especially after crankshaft grinding. Using the correct bearing size is essential for maintaining adequate oil pressure and ensuring the longevity of your engine's rotating assembly.

When rebuilding an Ecoboost engine, getting the bearing clearances right is paramount. This set provides a specific undersize option that can be crucial for achieving the desired oil clearance on a freshly machined crankshaft. Always refer to your engine's service manual for specific torque specifications and assembly procedures.